JP2005272173A - Self-flowable hydraulic composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a self-flowable hydraulic composition prevented from degradation in quality in the storage of a powdery mixture, keeping the quality in the preparation for a long period of time and containing alumina cement used as a self-leveling material as a hydraulic component. <P>SOLUTION: The self-flowable hydraulic composition contains a hydraulic component and hydrogen polysiloxane silicone oil. The hydraulic component (1) contains 0-90 pts.mass alumina cement (excluding 0 pts.mass), 10-100 pts.mass Portland cement (excluding 100 pts.mass) and 0-90 pts.mass gypsum (excluding 0 pts.mass) (in which the total of Portland cement and gypsum is 100 pts.mass) and contains 0.01-0.4 pts.mass hydrogen polysiloxane silicone oil to 100 pts.mass alumina cement. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a self-flowing hydraulic composition containing alumina cement as a hydraulic component having excellent characteristics and excellent storage stability as a self-leveling material mainly used for floor foundation adjustment of general buildings. .

As an alumina cement-based hydraulic composition containing silicone oil, Patent Document 1 states that in a self-leveling cement composition, 0.001 to 2 parts by weight of silicone oil is contained per 100 parts by weight of cement. Disclosed is a self-leveling cement composition.
Patent Document 2 discloses (A) hydraulic cement, (B) a crosslinked silicone having an average particle diameter of 0.05 to 100 μm in a silicone oil droplet having an average particle diameter of 0.1 to 500 μm dispersed in water. Silicone oil emulsion containing particles (wherein the particle size of the crosslinked silicone particles is smaller than the particle size of the silicone oil droplets) {the total weight of the silicone oil and the crosslinked silicone particles in component (B) is the component (A) An amount of 0.1 to 50 parts by weight with respect to 100 parts by weight} and, if necessary, (C) an aggregate composition is disclosed.
Further, Patent Document 3 discloses 100 parts by weight of an alkali metal salt or ammonium salt of a copolymer of a vinyl monomer having 4 to 10 carbon atoms and an α, β-unsaturated dicarboxylic anhydride, and a nonion having an HLB value of 12 or more. Dispersants for cement containing 0.3 to 10 parts by weight of a surfactant and 0.001 to 1 part by weight of silicone oil are disclosed.

Patent Document 4 discloses a composition comprising a hydraulic component composed of alumina cement, Portland cement, gypsum, and blast furnace slag, a coagulation regulator composed of a lithium salt and a boric acid compound, a water reducing agent, and a thickener. Has been.
Patent Document 5 discloses a composition comprising a hydraulic component composed of alumina cement, Portland cement, gypsum, and blast furnace slag, a water reducing agent, and a thickening agent.

Japanese Patent No. 3198138 JP 2001-89221 A Japanese Patent Laid-Open No. 5-246743 JP 2000-211961 A JP 2000-302519 A

Since the hydraulic composition containing alumina cement is excellent in quick-curing property, it is mainly used for adjusting the floor base of general buildings.
As for the delivery method of self-leveling material, a slurry in which powder and water are kneaded at the factory is transported to the site by an agitator vehicle (for example, a raw concrete method), and a powder is transported to the site by a dedicated lorry vehicle. There is a kneading method (for example, on-site kneading method), but the latter is an effective means because it can supply a slurry with stable fluidity from the start to the end without being affected by the transport distance to the site. Yes. However, since the powder product may be temporarily stored at a distribution center or the like, the influence on the quality due to the storage period such as weathering of the cement is a problem.
One of the problems of hydraulic compositions containing alumina cement is that the quality of fluidity and strength development may change depending on the storage period. Therefore, an alumina cement-based hydraulic composition with excellent storage stability can be obtained. It has been demanded.

  The present invention is a self-flowing hydraulic fluid containing alumina cement used as a self-leveling material as a hydraulic component, which prevents deterioration in quality during storage of the powder mixture and can maintain the quality during preparation over a long period of time. The purpose is to provide a composition.

  By blending a specific silicone oil with a hydraulic composition containing alumina cement, the present invention has been solved by finding a dramatic improvement in quality stability during storage (powder mixture storage). In the present invention, it is considered that a specific silicone oil is blended with alumina cement to suppress a chemical reaction between alumina cement powders during powder storage.

The present invention is a hydraulic composition comprising a hydraulic component and hydrogen polysiloxane silicone oil,
Hydraulic components are 0 to 90 parts by mass of alumina cement (excluding 0 parts by mass), 10 to 100 parts by mass of Portland cement and 0 to 90 parts by mass of gypsum (excluding 0 parts by mass) (alumina cement, Portland cement and gypsum). The total amount is 100 parts by weight),
To provide a self-flowing hydraulic composition containing 0.01 to 0.4 parts by mass of hydrogen polysiloxane silicone oil with respect to 100 parts by mass of alumina cement.

The preferable aspect of the self-flowing hydraulic composition of this invention is shown. These can be combined.
The hydraulic component preferably contains 10 to 350 parts by mass of blast furnace slag with respect to 100 parts by mass of the total amount of alumina cement, Portland cement and gypsum.
The self-flowing hydraulic composition preferably contains 0.01 to 0.2 parts by mass of hydrogen polysiloxane silicone oil with respect to 100 parts by mass of alumina cement.
The self-flowing hydraulic composition preferably contains fine aggregate.
The self-flowing hydraulic composition preferably contains 60 to 200 parts by mass of the fine aggregate with respect to 100 parts by mass of the hydraulic component.
The self-flowing hydraulic composition preferably contains an admixture such as a water reducing agent, an antifoaming agent or a thickener.
The self-flowing hydraulic composition is 0.01 to 0.20 parts by mass of the water reducing agent, 0.05 to 0.5 parts by mass of the thickener, and 2 parts by mass of the antifoaming agent with respect to 100 parts by mass of the hydraulic component. It is preferable that it contains parts or less.
The self-flowing hydraulic composition preferably contains a setting rate modifier.
The self-flowing hydraulic composition preferably contains 0.05 to 5 parts by mass of a setting modifier with respect to 100 parts by mass of the hydraulic component.
The self-flowing hydraulic composition preferably contains a setting rate adjusting agent and an admixture such as a water reducing agent, an antifoaming agent, and a thickening agent.

The self-flowing hydraulic composition of the present invention can be used as a self-leveling material, exhibits excellent storage stability, has little change over time in fluidity and hardness development after mortar adjustment, and has a quality retention period. Dramatically improved.
According to the present invention, the quality stability of the self-flowing hydraulic composition during storage (powder mixture storage) is dramatically improved.

The hydraulic component includes alumina cement, gypsum and Portland cement as essential components, and further includes blast furnace slag as necessary.
One of the important requirements that the self-leveling material should have is that it has an appropriate rapid hardening property, but the rapid hardening property primarily depends on the type of hydraulic component contained. The Portland cement system has the disadvantages that the curing speed is slow and the drying shrinkage is large, while the fast-curing cement system has an improvement in terms of the curing speed, but has the disadvantage that the fluidity is low and the strength is low. Have.
In particular, by using a hydraulic component made of alumina cement, gypsum and Portland cement, and a hydraulic component made of alumina cement, Portland cement, gypsum and blast furnace slag as the hydraulic component, it is possible to compensate for the above-mentioned drawbacks. It is preferable because it is possible.
Hydraulic components are 0 to 90 parts by mass of alumina cement (excluding 0 parts by mass), 10 to 100 parts by mass of Portland cement and 0 to 90 parts by mass of gypsum (excluding 0 parts by mass) (alumina cement, Portland cement and gypsum). The total amount is 100 parts by mass.), Further, 0 to 90 parts by mass of alumina cement (excluding 0 parts by mass), 10 to 100 parts by mass of Portland cement and 0 to 90 parts by mass of gypsum (excluding 0 parts by mass). (The total amount of alumina cement, Portland cement and gypsum is 100 parts by mass.) And the total amount of alumina cement, Portland cement and gypsum is 100 parts by mass. It is preferable because it has hardness, high fluidity and strength, and good dimensional stability.

Alumina cement has a potentially rapid hardening property, and gives a cured product excellent in chemical resistance and fire resistance after curing. In addition, due to the presence of blast furnace slag having latent hydraulic properties, a decrease over time in the strength of the cured body, which is a drawback thereof, is suppressed. Several types of alumina cements having different mineral compositions are known and commercially available, and all of them are monocalcium aluminate (CA). However, in terms of strength and colorability, there are many CA components and C _4. Alumina cement with a small amount of small components such as AF is preferred.
The addition amount of the alumina cement is 0 to 90 parts by mass (excluding 0 parts by mass), preferably 5 to 80 parts by mass, more preferably 20 to 70, if the total amount of alumina cement, Portland cement and gypsum is 100 parts by mass. Part by mass, more preferably 25 to 60 parts by mass, particularly preferably 30 to 50 parts by mass is preferred.

  As for gypsum, each gypsum such as anhydrous and semi-water can be used as one kind or a mixture of two or more kinds regardless of the kind. Gypsum is rapidly hardened and acts as a component for maintaining dimensional stability after curing. The amount of gypsum added is 0 to 90 parts by mass (excluding 0 parts by mass), preferably 5 to 70 parts by mass, more preferably 10 to 60 parts by mass, when the total amount of alumina cement, Portland cement and gypsum is 100 parts by mass. Parts, more preferably 15 to 50 parts by mass, particularly preferably 20 to 40 parts by mass. If the amount is too small, the dimensional stability may be lowered. If the amount is too large, the water resistance is lowered, and abnormal swelling due to water may occur. The total amount of 100 parts by mass of alumina cement, Portland cement and gypsum means that the sum of the component amounts of alumina cement, Portland cement and gypsum is 100 parts by mass.

As the Portland cement, ordinary Portland cement, early-strength Portland cement, or the like can be used. Use of Portland cement as the hydraulic component is preferable because it is effective for cost reduction.
The amount of Portland cement added is 10 to 100 parts by weight (excluding 100 parts by weight), preferably 12 to 90 parts by weight, and more preferably 15 to 70, when the total amount of alumina cement, Portland cement and gypsum is 100 parts by weight. It is preferable to add in the range of 17 to 50 parts by mass, particularly preferably 20 to 40 parts by mass.

The blast furnace slag not only increases the crack resistance of the hardened body due to drying shrinkage, but also has the effect of improving the hardened body strength of alumina cement. The amount of blast furnace slag added is preferably 10 to 350 parts by weight, more preferably 30 to 250 parts by weight, more preferably 50 to 200 parts by weight, particularly 100 parts by weight of the total amount of alumina cement, Portland cement and gypsum. Preferably, the amount is 70 to 130 parts by mass. If the amount is too small, the shrinkage increases. If the amount is too large, the strength may decrease.
As the blast furnace slag, a brane specific surface area of 3000 cm <2> / g or more as defined in JIS A-6206 can be used.

In the self-flowing hydraulic composition of the present invention, 0.01 to 0.4 parts by mass, preferably 0.01 to 0.2 parts by mass of hydrogen polysiloxane silicone oil is added to 100 parts by mass of alumina cement. Preferably it is 0.01-0.1 mass part, Especially preferably, it is a composition containing 0.05-0.1 mass part.
If the amount of hydrogen polysiloxane silicone oil added is less than the above range with respect to 100 parts by mass of alumina cement, the storage stability of the alumina cement-based hydraulic composition cannot be sufficiently obtained. In some cases, the strength of the cured product may be reduced, and this is uneconomical.

As the hydrogen polysiloxane silicone oil, a known silicone oil having a Si-H bond can be used, which can be dispersed and blended with powder such as alumina cement, and can coat the surface of alumina cement particles. Things can be used.
The hydrogen polysiloxane silicone oil is preferably an alkyl hydrogen polysiloxane silicone oil such as methyl hydrogen polysiloxane silicone oil (trade name: KF-99, manufactured by Shin-Etsu Chemical Co., Ltd.).

The self-flowing hydraulic composition of the present invention can be further blended with fine aggregates as long as the characteristics of the present invention are not impaired depending on the purpose.
For fine aggregates, silica sand, river sand, sea sand, limestone, slaked lime, alumina clinker, calcium carbonate, fly ash, silica powder, clay minerals, waste FCC catalyst and other inorganic materials, crushed resin such as urethane crushed and EVA foam, etc. Can be used.
As for the fine aggregate, it is preferable to use fine aggregate such as silica sand, river sand, sea sand, limestone, alumina clinker, quartz powder, waste FCC catalyst and the like having a small particle diameter.
The fine aggregate can be added within a range that does not impair the characteristics of the present invention, and is preferably 60 to 200 parts by mass, more preferably 70 to 150 parts by mass, and more preferably 75 to 100 parts by mass of the hydraulic component. To 120 parts by mass, particularly preferably 80 to 110 parts by mass.

  The self-flowing hydraulic composition of the present invention is a coagulant that is a component that promotes coagulation, admixtures such as water reducing agents, antifoaming agents, thickeners, etc., as long as it does not impair the characteristics of the present invention. It is preferable to include a setting rate adjusting agent such as an accelerator and a setting retarding agent that is a component that delays setting.

The most basic requirement that a self-leveling material should have is high fluidity. In order to obtain a slurry having high fluidity, it is preferable to add a water reducing agent. In particular, in the present invention, the FCC catalyst preferably has a high water absorption, so that an appropriate water reducing agent is preferably added. Moreover, when the addition amount of a water reducing agent is increased, it may become easy to produce aggregate separation, and it is preferable to use together with a thickener.
As the water reducing agent, naphthalene-based, melamine-based, polycarboxylic acid-based and the like can be used, and the polycarboxylic acid-based is preferable for the optimum combination with the thickener used together.
The addition amount of the water reducing agent can be added within a range not impairing the characteristics of the present invention, and is 0.01 to 0.20 parts by mass, and further 0.02 to 0.18 parts by mass with respect to 100 parts by mass of the hydraulic component. Parts, particularly 0.05 to 0.15 parts by mass.

As the thickener, cellulose-based, protein-based, latex-based, water-soluble polymer-based, and the like can be used, and in particular, cellulose-based can be used.
The addition amount of the thickener can be added within a range not impairing the characteristics of the present invention, and is 0.05 to 0.5 parts by mass, more preferably 0.05 to 0.3 parts per 100 parts by mass of the hydraulic component. It is preferable to contain a mass part, especially 0.05-0.2 mass part. If the amount of the thickener added is increased, the fluidity may be lowered, which is not preferable.
It is preferable to use a thickener and an antifoaming agent in combination in order to give a favorable effect on the suppression of aggregate separation, the suppression of bubble generation, and the improvement of the surface of the cured body, and to improve the properties as a self-leveling material.

As the antifoaming agent, known materials such as synthetic materials such as silicon-based, alcohol-based, and polyether or plant-derived natural materials can be used.
The addition amount of the antifoaming agent can be added within a range not impairing the characteristics of the present invention, and is 2 parts by mass or less, further 1 part by mass or less, particularly 0.2 parts by mass with respect to 100 parts by mass of the hydraulic component. The following is preferred. When the defoaming agent is added in a larger amount than the above, the defoaming effect may not be improved.

The alumina cement-based hydraulic composition of the present invention can be further blended with a setting rate adjusting agent in a range not impairing the characteristics of the present invention depending on the purpose.
As the setting rate adjusting agent, a setting accelerator that is a component that accelerates the setting, a setting retarder that is a component that delays the setting, and the like can be used.
As the setting rate adjusting agent, it is preferable to use a setting accelerator and a setting retarder in combination. By adding a set accelerator and a set retarder in combination, for example, fluid retention that enables a pot life of 30 minutes or more, and subsequent rapid curing, a light walk on the same day and a finish within 3 days Fast hardening and quick drying that can be applied are secured, wrinkles due to slurry movement and surface drying, generation of traces of bubbles, surface pulverization due to poor surface hardening at low temperatures, cracks during condensation at high temperatures, etc. The risk of occurrence is reduced, and a cured product having good surface properties can be obtained. Furthermore, it is possible to achieve both the above-mentioned super-fast hardness, fluidity retention and excellent cured product properties in a wide range from low temperature to high temperature.

A known setting accelerator can be used as the setting accelerator. Examples of setting accelerators include inorganic and organic lithium salts such as lithium carbonate, lithium chloride, lithium sulfate, lithium nitrate, lithium hydroxide, lithium acetate, lithium tartrate, lithium malate, lithium citrate, and other organic acids. Lithium salt such as can be used. In particular, lithium carbonate is preferable from the viewpoints of effects, availability, and cost.
As the setting accelerator, it is preferable to use a particle size that does not interfere with the properties, and the particle size is preferably 50 μm or less.
Particularly when a lithium salt is used, the particle diameter of the lithium salt is preferably 50 μm or less, more preferably 30 μm or less, and particularly preferably 10 μm or less. If the particle diameter is larger than the above range, the solubility of the lithium salt decreases, which is not preferable. Then, it may be conspicuous as a large number of fine spots, and the appearance may be impaired.

  As the setting retarder, a known setting retarder can be used. As an example of a set retarder, sodium salts such as inorganic sodium salts and organic sodium salts such as sodium sulfate, sodium bicarbonate, sodium tartrate, sodium malate, sodium citrate, and sodium gluconate can be used. . In particular, sodium bicarbonate and sodium tartrate are preferable from the viewpoints of effect, availability, and price. It should be noted that if the amount added is large, fluidity may be deteriorated, poor curing may occur, or surface defects may occur due to the generation of breathing water.

The setting rate adjusting agent can be added as appropriate within the range that does not impair the properties, depending on the hydraulic component and alumina cement-based hydraulic composition to be used. Components of the setting accelerator and setting retarder, addition amount and mixing ratio Can be appropriately selected to adjust the fluidity and pot life.
When the setting speed adjusting agent is used for adjusting fluidity and pot life, the total amount of lithium salt and sodium salt is 0.05 to 5 parts by mass, and further 0.1 to 0.1 parts by mass with respect to 100 parts by mass of the hydraulic component. It is preferable to add in the range of 2 parts by mass, particularly 0.30 to 0.70 parts by mass.
When the self-fluidic hydraulic composition is used as a self-leveling material, the setting rate adjusting agent preferably has a sodium salt to lithium salt molar ratio in the range of 1 to 50, and if the molar ratio is less than 1, Condensation is too early and self-fluidity decreases, so the pot life may be too short, which may hinder construction, and if it is more than 50, the fast-curing property decreases and early opening becomes difficult. This is not preferable.

  The flow value of the self-flowing hydraulic composition of the present invention is preferably 190 mm or more, more preferably 200 mm or more, and particularly preferably 210 mm or more, to obtain a cured body surface with high ease of construction and high smoothness. This is preferable because it is easily formed.

The self-flowing hydraulic composition of the present invention can be used as a self-leveling material such as a floor foundation having fluidity and fluidity retention by further adding water within a range that does not impair the properties. It can be used in the temperature range of ° C, in particular 5 to 35 ° C.
When the self-fluid hydraulic composition of the present invention is used as a self-leveling material for adjusting the floor base, water is 28 to 60 parts by mass, more preferably 38 to 58 parts by mass, particularly 48 to 48 parts by mass with respect to 100 parts by mass of the hydraulic component. It is preferable to add 56 parts by mass.
When the self-fluid hydraulic composition of the present invention is used as a self-leveling material for adjusting the floor base, water is 14 to 30 parts by mass, and further 19 to 29 parts by mass with respect to 100 parts by mass of the self-fluid hydraulic composition. In particular, it is preferable to add 24 to 28 parts by mass.
The self-fluid hydraulic composition of the present invention is a self-fluid hydraulic composition containing a hydraulic component, fine aggregate, water reducing agent and thickener, setting modifier and antifoaming agent, and further adding water. By adjusting the amount, it is possible to obtain a floor base material having excellent fluidity and fluid retention.

  The self-flowing hydraulic composition of the present invention can be applied as a self-leveling material by a known method. For example, it is disclosed by Unexamined-Japanese-Patent No. 2001-040862 etc. as an example of construction.

  The self-flowing hydraulic composition of the present invention can be further mixed with a polymer emulsion in accordance with the purpose within a range not impairing the characteristics of the present invention.

The polymer emulsion is a synthetic resin emulsion, such as a polyvinyl acetate emulsion, a copolymer emulsion of ethylene and vinyl acetate, a copolymer of ethylene, vinyl acetate and a (meth) acrylic acid derivative, and ethylene and (meth) acryl. Copolymer emulsion with acid derivative, emulsion of poly (meth) acrylic acid derivative, copolymer emulsion of styrene and (meth) acrylic acid derivative, polychloroprene latex, copolymer emulsion of vinyl acetate and vinyl chloride, styrene And butadiene copolymer emulsions, acrylonitrile-butadiene copolymer emulsions, vinyl acetate and (meth) acrylic acid derivative emulsions, and other synthetics containing at least one ethylene, styrene, vinyl acetate, (meth) acrylic acid derivative, etc. Resin emulge It can be used down. The (meth) acrylic acid derivative means acid derivatives such as acrylic acid, methacrylic acid, and esters thereof.
As the emulsion, resin-based emulsions developed for architectural use such as ethylene-vinyl acetate copolymer emulsion and acrylic resin emulsion can be preferably used.
Any glass transition temperature of the polymer component contained in the emulsion can be used.

  As the polymer emulsion, one obtained by a known production method can be used. For example, in the presence of an emulsifier, a polymerization monomer used as a raw material for a synthetic resin in water or a water-containing solvent is used with a polymerization initiator. It can be produced by a method of emulsion polymerization.

As the emulsifier, known ones can be used, and examples thereof include anionic, nonionic, cationic or amphoteric surfactants and protective colloids such as polyvinyl alcohol.
As the polymerization initiator, those capable of radical polymerization in water or a hydrous solvent are preferable, and examples thereof include hydrogen peroxide, peracetic acid, persulfuric acid, water-soluble peroxides such as ammonium salts and sulfates thereof, and salts thereof. be able to. Further, organic peroxides such as benzoyl peroxide, t-butyl hydroperoxide, 2,2′-azobisisobutylnitrile, and reducing agents such as sodium metasulfite and sodium pyrosulfite can be used in combination.
The amount of the polymerization initiator used can be appropriately selected as long as the emulsion can be produced.

  The polymer emulsion contains a powder emulsion that does not contain water. If a powder emulsion is used, all components except for the water can be combined into one package, and it can be used simply by adding water at the construction site. is there.

  In the polymer emulsion, the solid content of the synthetic resin contained in the emulsion can be appropriately selected, but 30 to 80 parts by mass is preferable, and 40 to 60 parts by mass is more preferable in 100 parts by mass of the emulsion. If it is less than 30 parts by mass, it may be difficult to cure, and if it exceeds 80 parts by mass, the viscosity may be too high and workability may be lowered, or a coating film may not be formed uniformly.

As the ethylene-vinyl acetate copolymer emulsion, a known emulsion obtained by copolymerizing ethylene and vinyl acetate can be used.
As the ethylene vinyl acetate copolymer emulsion, a product using a water-soluble polymer such as polyvinyl alcohol or cellulose derivative as an emulsifier or protective colloid can be preferably used. In particular, the ethylene vinyl acetate copolymer emulsion is preferably one using polyvinyl alcohol as a protective colloid.
In the polymer component of the ethylene-vinyl acetate copolymer emulsion, the vinyl acetate content is preferably 30 to 90% by mass, more preferably 50 to 90% by mass, and particularly preferably 60 to 86% by mass.
The content of the ethylene vinyl acetate copolymer component in the ethylene vinyl acetate copolymer emulsion is preferably 40 to 65% by mass, more preferably 45 to 60% by mass, and particularly preferably 47 to 60% by mass.

As the acrylic resin emulsion, one or more (meth) acrylate compounds such as alkyl (meth) acrylate such as methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, or the like Those obtained by polymerizing two or more kinds, and those obtained by copolymerization with vinyl compounds such as styrene, vinyl acetate and vinylidene chloride which can be copolymerized with these monomers can be used. (Meth) acrylate means methacrylate and acrylate.
The acrylic resin emulsion is preferable because the polymer component contained in the emulsion is excellent in elongation by using a polymer that is not crosslinked, more preferably a polymer that is not crosslinked within or between polymers.
For the acrylic resin emulsion, known emulsifiers and protective colloids can be used. For example, water-soluble polymers such as polyvinyl alcohol and cellulose derivatives, emulsifiers and protective colloids such as nonionic surfactants and ionic surfactants can be used. Can be used.
As the acrylic resin emulsion, a known emulsion can be used, and the content of the acrylic resin component is not particularly limited.

  The self-flowing hydraulic composition of the present invention can be uniformly adjusted by mixing with a general mixer. As the mixer, a known mixer can be used, and examples thereof include a Nauter mixer, a ribbon mixer, and an omni mixer.

  The self-flowing hydraulic composition of the present invention is mixed with a general mixer to uniformly adjust the composition, and is generally used in a powder state, such as a cement packaging bag, a paper bag, a polyethylene bag, and a polyvinyl. In addition to the bag, it can be stored in a closed container made of metal, resin, paper or the like that does not come in contact with outside air.

The self-flowing hydraulic composition of the present invention is mixed with water or a polymer emulsion and adjusted to mortar, concrete, grout material, etc., and is used for general civil engineering / building structures, structures requiring fire resistance and acid resistance. Can be used for construction etc.
When used as a self-leveling material, the self-flowing hydraulic composition of the present invention can be used as a floor finishing material, a floor finishing material in factories, warehouses, parking lots, gas stations, kitchens, and the like.

The self-flowing hydraulic composition of the present invention preferably has a mortar flow value of 190 mm or more.
In addition, the shore hardness (surface hardness) of the mortar cured body is a measure of the time (light walkable time) during which a person can move on the cured body and perform repair work, etc., and the storage period of the powder is prolonged. However, it is preferable that the development of hardness is not delayed.

  Hereinafter, the present invention will be described in more detail based on examples. However, the present invention is not limited by the following examples.

The raw materials used in Examples 1 to 3 and Comparative Examples 1 and 2 were as follows.
1) Hydraulic component:
・ Alumina cement (Lafarge Aluminate)
・ Portland cement (Ube Hayashi cement)
・ Gypsum: Type II anhydrous gypsum (manufactured by Central Glass Co., Ltd.).
・ Blast furnace slag (manufactured by Chiba Riverment)
2) Aggregate:
・ Silica sand: No. 4 silica sand.
3) Setting rate modifier:
-Accelerator: Lithium carbonate (commercial product).
Delay agent: sodium bicarbonate (commercial product) and sodium tartrate (commercial product).
4) Admixture:
-Water reducing agent: Polycarboxylic acid water reducing agent (manufactured by Kao Corporation).
-Thickener: Methylcellulose thickener (Matsumoto Yushi Co., Ltd.).
-Antifoaming agent: A polyether type antifoaming agent (manufactured by San Nopco).
5) Silicone oil:
SI oil A: methyl hydrogen polysiloxane silicone oil (manufactured by Shin-Etsu Chemical Co., Ltd., product name: KF-99).
SI oil B: alkyl-modified silicone oil (manufactured by Shin-Etsu Chemical Co., Ltd., product name: KF-4003).
SI oil C: dimethyl silicone oil (manufactured by Shin-Etsu Chemical Co., Ltd., product name: KF96).

(Evaluation of mortar)
1) Flow value: Performed according to the quality standard method (JASS 15M-103) for self-leveling materials.
2) Shore hardness (surface hardness): Measured according to a hardness test method for vulcanized rubber and thermoplastic rubber (JIS K-6253-1997).

[Examples 1-3 and Comparative Examples 1 and 2]
Components having composition ratios shown in Table 1 were mixed using an Eirich mixer to obtain a mixture of hydraulic components and silicone oil.

(Powder storage period and mortar evaluation)
The mixture was sealed in 25 kg in a paper bag and stored in a test chamber at a temperature of 35 ° C. and a relative humidity of 65% for a predetermined period (1 day, 7 days, 14 days and 28 days). The stored paper bag was opened, 26 parts by mass of water was added to 100 parts by mass of the mixture, and the mixture was kneaded for 3 minutes to adjust the mortar. The obtained mortar was measured for flow value and Shore hardness, and the results are shown in Table 2.

In the composition of Comparative Example 1 containing no silicone, a significant decrease in Shore hardness was observed 7 days after preparation. Moreover, also in the compositions to which the alkyl-modified silicone oil and dimethyl silicone oil of Comparative Example 2 and Comparative Example 3 were added, a significant decrease in Shore hardness was observed 7 and 14 days after preparation.
On the other hand, in the composition to which the methyl hydrogen polysiloxane silicone oils of Examples 1 to 3 were added, the shore hardness was decreased and fluidity decreased even after 7 days after preparation, and even after 28 days when the addition amount was large. There is almost no decrease in.

Claims (4)

A hydraulic composition comprising a hydraulic component and hydrogen polysiloxane silicone oil,
(1) Hydraulic components are alumina cement 0-90 parts by mass (excluding 0 parts by mass), Portland cement 10-100 parts by mass (excluding 100 parts by mass) and gypsum 0-90 parts by mass (excluding 0 parts by mass). ) (The total amount of alumina cement, Portland cement and gypsum is 100 parts by weight),
A self-flowing hydraulic composition comprising 0.01 to 0.4 parts by mass of hydrogen polysiloxane silicone oil with respect to 100 parts by mass of alumina cement.   The hydraulic component according to claim 1, further comprising 10 to 350 parts by mass of blast furnace slag with respect to 100 parts by mass of the total amount of alumina cement, Portland cement and gypsum.   The self-flowing hydraulic composition according to claim 1 or 2, wherein the fine aggregate contains 60 to 200 parts by mass with respect to 100 parts by mass of the hydraulic component. The self-flowing hydraulic composition according to any one of claims 1 to 3, wherein the self-flowing hydraulic composition further contains a setting rate adjusting agent and an admixture.